The function mtlb_sort(X[,dim[,mode]]) is used by
mfile2sci to replace sort(X[,dim[,mode]]) when
it was not possible to know what were the inputs while porting Matlab code
to Scilab. This function will determine the correct semantic at run time.
If you want to have a more efficient code it is possible to replace
mtlb_sort call by gsort call.